in 2005, obama's predecessor, george w. bush, was harshly criticized for his slow response to hurricane katrina. the storm devastated the south of the united states including the city of new orleans. republican challenger mitt romney also canceled all campaign events in the state of virginia on sunday. both candidates are concerned about the impact on voting. >>> united nations officials are urging the government of myanmar to stop an ethnic conflict that's displaced tens of thousands of people. buddhists are fighting a muslim minority in the western state of rakhine state. >> reporter: the conflict involves majority buddhists and minority muslims called rohingyas. local authorities say the latest wave of violence has killed 84 people and wounded more than 120 others. the international group human rights watch released satellite images of muslim homes in the area. compared with photos from march, they reveal heavy damage. the united nations says the latest fighting has forced more than 22,000 people from their homes. the co